RE: Quota for root ?

[Glynn Clements <glynn@gclements.plus.com>]

Sion Khalaf wrote:

> There is no possibility to do the first solution.
> The second, regarding drive  mounting, is it ram drive?

No, loopback filesystem.

> If so, How to mount it ?

	mount -o loop <filename> <mount point>

To create the file, first create a suitably-sized file with e.g.:

	dd if=/dev/zero out=loopfile.dat bs=1m count=100	#100Mb

then create a filesystem on it with:

	mke2fs -F loopfile.dat

> Anyway, I am looking for a way to make my file system read only.
> That will surely, be the best solution.
> 
> My application is writing into certain folder, not on the physically /
> File system,
> So I can make the / FS read only, Do you have an idea how can I do that
> ?

Normally, directories which need to be writable, e.g. /var and /tmp,
would use separate partitions. Those partitions would be writable (but
probably using the noexec and nodev options), but the root filesystem
would be read-only.

The most common issue with making the root filesystem read-only is
that "mount" tries to write to /etc/mtab, which will fail. Either use
the -n option to mount or recompile mount to use e.g. /var/run/mtab
instead.

-- 
Glynn Clements <glynn@gclements.plus.com>